Naslov
Specialized metabolites content of broccoli microgreens grown under the different LED wavelengths

Autori
Vrkić, Roberta ; Šic-Žlabur, Jana ; Dujmović Mia ; Benko Božidar

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Proceedings - 10th International Congress of Food Technologists, Biotechnologists and Nutritionists / Draženka, Komes ; Vidaček Filipec, Sanja ; Voučko, Bojana ; Šeremet, Danijela ; Marković, Ksenija ; Rumora Samarin, Ivana - Zagreb : Hrvatsko društvo prehrambenih tehnologa, biotehnologa i nutricionista, 2022, 154-154

Skup
10th International Congress of Food Technologists, Biotechnologists and Nutritionists

Mjesto i datum
Zagreb, Hrvatska, 30.11.2022. - 02.12.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
Broccoli ; Light Emitting Diodes ; Specialized metabolites ; Antioxidant capacity

Sažetak
Growing microgreens in greenhouses requires controlled growing conditions such as temperature, humidity and light. Light, as the most important factor for growing plants, with its quality (wavelenghts) and photoperiod (duration), directly affects the accumulation of specialized metabolites (SM) with the aim of growing plant material of high nutritional value. Photosynthetically active radiation (PAR) includes wavelengths in the range of 400-800 nm. Specific photoreceptors of plant cells absorb blue (400-500 nm), red (600-700 nm) and dark red (700-800 nm) wavelengths. Red wavelengths have the most effect on morphological properties of plant, while blue wavelengths have an effect on SM synthesis. The aim of this research was to determine the effect of supplemental LED's lighting with blue (450 nm), red (620 nm) and combination of blue and red spectrum (50:50) in the photoperiod of 14 h on SM content of broccoli microgreens (Brassica oleracea L. var. italica Plenck). Broccoli microgreens were grown in a climate chamber with fully controlled conditions for plant cultivation (25 °C, 60% RH). Microgreens were manually cut at the base of the hypocotyl in the cotyledon phenophase at a height of 7.5 cm after eight days. At harvest, plant material samples weighted 50 g were taken for the following analyses: total dry matter (TDM), ascorbic acid content (AsA), total phenolic content (TPC), clorophyll content, color content and antioxidant capacity. The highest TDM content (6.72%), TPC content (95.36 mg GAE/100 g) and antioxidant capacity (1228.2 µmol TE/l), as well as color content was recorded under combined lighting. Samples grown under LED supplemental lighting of 620 nm (red spectrum) showed the highest AsA content (88.17 mg/100 g fw). The most clorophyll (0.92 mg/l) and 155 carotenoids (0.41 mg/l) were acumulated under LED lighting of 450 nm (blue spectrum). According to the results, the most SM accumulated under the combined wavelengths, while the red lighting affected vitamin C accumulation. Clorophylls and carotenoids, which are also important antioxidants, were highly accumulated under blue lighting. LED's supplemental lighting has a positive effect on the SM accumulation in broccoli microgreens, which represents broccoli microgreens as a health- promoting functional food.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA